1 //===- DebugLocStream.cpp - DWARF debug_loc stream --------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "DebugLocStream.h"
11 #include "DwarfDebug.h"
12 #include "llvm/CodeGen/AsmPrinter.h"
13 
14 using namespace llvm;
15 
finalizeList(AsmPrinter & Asm)16 bool DebugLocStream::finalizeList(AsmPrinter &Asm) {
17   if (Lists.back().EntryOffset == Entries.size()) {
18     // Empty list.  Delete it.
19     Lists.pop_back();
20     return false;
21   }
22 
23   // Real list.  Generate a label for it.
24   Lists.back().Label = Asm.createTempSymbol("debug_loc");
25   return true;
26 }
27 
finalizeEntry()28 void DebugLocStream::finalizeEntry() {
29   if (Entries.back().ByteOffset != DWARFBytes.size())
30     return;
31 
32   // The last entry was empty.  Delete it.
33   Comments.erase(Comments.begin() + Entries.back().CommentOffset,
34                  Comments.end());
35   Entries.pop_back();
36 
37   assert(Lists.back().EntryOffset <= Entries.size() &&
38          "Popped off more entries than are in the list");
39 }
40 
~ListBuilder()41 DebugLocStream::ListBuilder::~ListBuilder() {
42   if (!Locs.finalizeList(Asm))
43     return;
44   V.initializeDbgValue(&MI);
45   V.setDebugLocListIndex(ListIndex);
46 }
47